Move SerilogLoggerFactory to Serilog.Extensions.Logging

[ChrisSimmons]

From a distance, it seems that while SerilogWebHostBuilderExtensions deals with bona fide ASP.NET concerns (e.g IWebHostBuilder), SerilogLoggerFactory would be better placed in a more generic .NET Core library. Perhaps Serilog.Extensions.Logging.

There's also the possibility that I'm completely insane. :)

Of course if not, I realize this would be a breaking change but maybe something to consider in the next major version of this library.

[khellang]

It could be moved and type-forwarded, since this package already depends on Serilog.Extensions.Logging 😊

[ChrisSimmons]

I'll happily take this task (unless of course someone else comes along and does the hard work)

[jasper-d]

@ChrisSimmons What's the status of this?

[nblumhardt]

This is part of serilog/serilog-extensions-logging#132

[nblumhardt]

@khellang RE the type forwarding, #87 doesn't do it as I took liberties breaking the SerilogLoggerFactory constructor's signature... Does seem like it would be nice and neat to type-forward here, though :-)